Editing Cross-platform interchange (section)

===Optimised, with connection guarantee===
Most advanced are coordinated cross-platform interchanges wherein interconnected trains also wait for each other, to "guarantee" scheduled interchanges even in the event of modest delays. To limit schedule disruption propagation throughout the entire network, additional waiting time for trains is usually limited to a certain period of time, depending on general network performance, further connections to be guaranteed, train category, train line, and a balanced consideration of other factors.

In practice, most railways coordinating cross-platform interchanges define a certain waiting time window for each guaranteed interchange. Some railway operators will briefly delay train departure signals to allow imminently arriving passengers time to interchange. For example, the [[Vienna U-Bahn]] metro signals train drivers to wait briefly, by operating a special white light signal triggered by the approach of an interchange train on another track.